Difference between ampersand (`&`) and dot (`.`)

ampersand dot sourcing scope

Source

• https://stackoverflow.com/a/54680512/12780516

• difference matters only when calling PowerShell scripts or functions (or their aliases) — for cmdlets and external programs, they act the same
• ampersand (&) — the call operator
  • executes scripts and functions in a child scope
• dot (.) — the dot-sourcing operator
  • executes scripts and functions in the current (calling) scope
  • typically used to modify the caller’s scope, by adding functions, variables, etc. for later use